Quest for 1,000 hp, back on the dyno!
#3137453
04/12/23 05:06 PM
04/12/23 05:06 PM
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Joined: Jan 2003
Posts: 9,997 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Well, i got close. Some head work, and picked up 25 hp over january dyno session. I tried 110.5 cl first, then moved the cam to 108. It only gained 1 hp average from 6200 to 7600 rpm. But torque was up 5 ft pds at 6200, tappering fast.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Quest for 1,000 hp, back on the dyno!
[Re: Cab_Burge]
#3137601
04/13/23 03:23 AM
04/13/23 03:23 AM
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gregsdart
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Cab, i run constant flow methanol injection. a total of 22 pulls, and the fuel curve was gradually perfected one small change at a time till no more power was seen at 6200 through 7600 rpm. timing was set the same way, and landed at 34 or 35 degrees giving equal results. so for 3000 density altitude, i know exactly where to run it. that was the air quality during testing. we set an altime record high temp for April 12 here. it was 80 degrees by the end of the setion. I went through the vacuum system before the dyno tests and was able to pull eight inches with the motor cold, ready for transport to the dyno using a drill, spinning the pump to about 2600rpm. but as you can see it didn't do as well running. i don't know why, other than maybe the aluminum block just doesn't have as good a ring seal under load as an iron block. As for the dyno, it had just been calibrated. The more i think about it, the happier i am with the final results. The 1,000 hp mark was an ego thing. A cast iron block would have to make 35 more horsepower to go as fast due to the extra 105 pounds my megablock weighed over this BMP block. At this point, if i were to chase down that magic 1,000 hp number, a dry sump system with better vacuum would probably push it over the top. As it is, i am only certed to 8:50 so i will most likely be running it at lower rpm to stay at or above 8:50. total car weight with driver should be 2850 at the line. All testing was done using my race headers, so no loss there when it goes in the car. it might actually run a touch better as collector length will be closer to the recomended length and open air, rather than the extra tube needed to hook up my side exit headers.
Last edited by gregsdart; 04/13/23 03:38 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Quest for 1,000 hp, back on the dyno!
[Re: gregsdart]
#3137603
04/13/23 03:36 AM
04/13/23 03:36 AM
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Joined: Aug 2003
Posts: 43,173 Bend,OR USA
Cab_Burge
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I've never ran any motor of my own or helped tune a straight alcohol motor so I know nothing about them as far as Lamda or AFR numbers and what they like to make the best power E85 is my current choice on my race motors, I may end up trying straight methanol alcohol on my next deal if pump E85 doesn't work well I'm hoping E85 will work well with NOS first and later on 25 to 30 lbs. of boost
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Quest for 1,000 hp, back on the dyno!
[Re: Cab_Burge]
#3137606
04/13/23 03:47 AM
04/13/23 03:47 AM
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gregsdart
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I've never ran any motor of my own or helped tune a straight alcohol motor so I know nothing about them as far as Lamda or AFR numbers and what they like to make the best power E85 is my current choice on my race motors, I may end up trying straight methanol alcohol on my next deal if pump E85 doesn't work well I'm hoping E85 will work well with NOS first and later on 25 to 30 lbs. of boost Good luck with it, Cab. i do know that pump E85 at only 108 octane and has less cooling ability to avoid detonation versus straight methanol. for a boosted application running that much boost, i would be real carefull with E85 pump. It may not do well resisting detonation where a methanol motor you just run it VERY fat, like 3.4 versus 5.6 for a modest normally aspirated motor. also power will be lower a touch( 3 to 5 percent?) with e 85. but you don't need to take 35 gallons with you for a race weekend, as you might with methanol if you make a lot of passes. i average 2 gallons for warmup and over 1.5 for each pass on methanol.
Last edited by gregsdart; 04/13/23 04:46 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Quest for 1,000 hp, back on the dyno!
[Re: gregsdart]
#3137748
04/13/23 03:19 PM
04/13/23 03:19 PM
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440Jim
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I went through the vacuum system before the dyno tests and was able to pull eight inches with the motor cold, ready for transport to the dyno using a drill, spinning the pump to about 2600rpm. but as you can see it didn't do as well running. i don't know why, other than maybe the aluminum block just doesn't have as good a ring seal under load as an iron block. Greg, what was the crankcase vacuum on the dyno? Is it the column showing about 3 "Hg or psi ? With your converter, I can see why you didn't pull lower, but did you get any info on the torque peak? ft-lbs and rpm From the posted dyno sheet, it looks like torque is declining during the entire pull.
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Re: Quest for 1,000 hp, back on the dyno!
[Re: 440Jim]
#3137771
04/13/23 04:30 PM
04/13/23 04:30 PM
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Al_Alguire
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Enough power with that number to get your 2850lb car well below its cert for sure. Anxious to hear how it goes at the track with the new found HP.
Like Jim asked what was the vacuum on the dyno? FWIW my little 540" aluminum block deal in the blue car pulls 11" with a cordless drill on the stand and its Star pump
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Quest for 1,000 hp, back on the dyno!
[Re: Al_Alguire]
#3137837
04/13/23 09:58 PM
04/13/23 09:58 PM
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gregsdart
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Enough power with that number to get your 2850lb car well below its cert for sure. Anxious to hear how it goes at the track with the new found HP.
Like Jim asked what was the vacuum on the dyno? FWIW my little 540" aluminum block deal in the blue car pulls 11" with a cordless drill on the stand and its Star pump on the dyno vacuum was only abou 6 inch, tapering to about 3 at peak hp. i notice on my 550/440-1 motor the power is only about 20 to 25 hp different till it passes about 6800 rpm, then the better heads(572-13) pull away. so i don't know what to expect for ETs, i will just have to give it a shot and see.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Quest for 1,000 hp, back on the dyno!
[Re: HardcoreB]
#3137901
04/14/23 08:42 AM
04/14/23 08:42 AM
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gregsdart
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Nice work Greg! It'll run fast, I have no doubt you'll go faster than 850's i fan see it going 8.50s but the converter might be a bit tight since this moror makes its power 400 rpm higher than the 440-1 heads, or so it appears. but not having done the upgrade to 7:50 cert, the current stall of 6200 will work ok.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Quest for 1,000 hp, back on the dyno!
[Re: gregsdart]
#3137933
04/14/23 11:46 AM
04/14/23 11:46 AM
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Al_Alguire
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I would be cocerned about the vacuum dropping at RPM. Loosing ring seal. Did it put alot of oil in the puke tank?
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Quest for 1,000 hp, back on the dyno!
[Re: Al_Alguire]
#3137934
04/14/23 11:47 AM
04/14/23 11:47 AM
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gregsdart
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I would be cocerned about the vacuum dropping at RPM. Loosing ring seal. Did it put alot of oil in the puke tank? maybe a quart in 22 pulls? vacuum started at 6.4 inch, dropped to 4 inch at 7600.
Last edited by gregsdart; 04/14/23 11:50 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Quest for 1,000 hp, back on the dyno!
[Re: Uberpube]
#3137939
04/14/23 12:09 PM
04/14/23 12:09 PM
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gregsdart
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So close, maybe some 5w20 for the glory run? ,π thanks, but no, i will pop for a dry sump first! less chance of driving over any parts!
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Quest for 1,000 hp, back on the dyno!
[Re: gregsdart]
#3137978
04/14/23 02:39 PM
04/14/23 02:39 PM
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Joined: Aug 2003
Posts: 43,173 Bend,OR USA
Cab_Burge
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So close, maybe some 5w20 for the glory run? ,π thanks, but no, i will pop for a dry sump first! less chance of driving over any parts! One of the Comp Eliminator tricks use to be to use 0 wt. synthetic oil for one run, I use 5w20WT in all my street and strip motors with lots of bearing clearances, .0035+ on the mains(both sizes) and .003+ on the rods also on both stock and 2.200 rod journal sizes Oil does two things, correct It lubricates and cools the metal rotating and moving parts in the motor The thinner oils lube all the rotating and moving internal parts sooner than the ticker oils due to making pressure sooner than the thicker, slower circulating oils do
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Quest for 1,000 hp, back on the dyno!
[Re: Cab_Burge]
#3138013
04/14/23 04:41 PM
04/14/23 04:41 PM
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Joined: Jan 2003
Posts: 19,363 Las Vegas
Al_Alguire
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The Vette runs 0 weight oil all the time...The bearings were 6 years old when they came out this past winter.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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